roto: Remove mode RGB. This one was for testing only. Also only force image format conversion when tracking is enabled.
roto: Remove mode RGB.
This one was for testing only.
Also only force image format conversion when tracking is enabled.

ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking